Squamous cell carcinoma
developing in an
intracranial epidermoid cyst (cholesteatoma)
Russell & Rubinstein’s Pathology of Tumors of the
The leading international professional reference text describing all aspects of the pathology
of brain tumours – genetics, molecular biology, epidemiology, morphology,
immunohistochemistry, diagnostic criteria and prognosis
Fourth Ventricle Epidermoid Tumor: Radiologic, Intraoperative, and Pathologic Findings
A 28-year-old woman with no known medical history presented with a history of progressive gait imbalance and left upper limb incoordination over a period of 2 years to the University Health Network in Toronto. The remainder of the patient’s history was noncontributory. At physical examination, gait ataxia, nystagmus, and left cerebellar signs including left arm dysmetria and dysdiadocho-kinesia were observed.
Intradiploic Epidermoid Cysts
Defining Benign Brain Tumors
Benign brain tumors are usually defined as a group of similar cells that do not follow normal cell division and growth patterns and develop into a mass of cells that microscopically do not have the characteristic appearance of a cancer. Most benign brain tumors are found by CT or MRI brain scans. These tumors usually grow slowly, do not invade surrounding tissues or spread to other organs, and often have a border or edge that can be seen on CT scans. These tumors rarely develop into metastatic (cancerous or spreading) tumors. Most benign brain tumors can be removed; the benign tumors usually do not reoccur after removal. The exact causes of benign brain tumors are not known, but investigators have suggested that family history, radiation exposure or exposure to chemicals (for example, vinyl chloride, formaldehyde) may be risk factors.
Epidermoid of the pituitary stalk and resulting diplopia.
31 year old woman with vertical diplopia for 2 months
Digital Journal of Ophthalmology 1998
Volume 4, Number 21
August 8, 1998
Epidermoid tumors: Review of the literature